Accession Number : ADA332115

Title :   Seismic Wave Propagation in Southern and Central Africa

Descriptive Note : Final technical rept. 1 Nov 93-30 Apr 97

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF GEOSCIENCES

Personal Author(s) : Langston, Charles A. ; Nyblade, Andrew A. ; Zhao, Ming

PDF Url : ADA332115

Report Date : 18 SEP 1997

Pagination or Media Count : 24

Abstract : Structure of the crust and upper mantle in southern and central Africa is investigated using seismic data from the Global Seismic Network and a special PASSCAL deployment of stations in Tanzania, East Africa. Structure models are developed to understand wave propagation important to issues concerning the verification of the Comprehensive Test Ban Treaty and to also investigate the tectonic basis for the African "Superswell", a previously identified region of anomalously high topography covering the southern half of the African continent. Through modeling of regional and teleseismic P, S, and Pnl phases it is found that the upper mantle has relatively high velocities down to depths exceeding 700 km.

Descriptors :   *WAVE PROPAGATION, *SEISMIC WAVES, *AFRICA, HIGH VELOCITY, TOPOGRAPHY, SEISMIC DATA, EARTH MANTLE, TANZANIA.

Subject Categories : Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE